Air motor



B. coNES AIR MOTOR July 3, 1945.

Filed June 24, 1945 Il /0 mn nl pm 2 Sheets-Sheet 1 Inventor Ben Cane-s -July 3,1945. B, COMES 2,379,683

- AIR MOTOR Filed June 24, 1943 2 Sheets-Sheet 2 u I v 9 2..

I Hi i g /7 w I 7 5/7 A? r r, 1 P of Inventor Ben (Iowa-s Patented July 3, 1945 UNITED STATES PATENT OFFICE Q AIR MOTOR Ben (Jones, Indianapolis, Ind.

Application June 24, 1943, Serial No. 492,099

1 Claim. .(Cl. 121-38) The present invention relates to new and useful improvements in air motors and has for its primary object to provide a non-diaphragm type motor embodying a pair of telescoping cylinders.

economical to operate, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like reference numerals refer to like parts throughout, and in Which-- Figure 1 is a side elevational view.

Figure 2 is a vertical sectional view.

Figure 3 is a transverse sectional view taken on a line 33 of Figure 2, and

Figure 4 is a side elevational view of the spring ring for the sealing ring.

Referring now to thedrawings in detail wherein for the purposes of illustration I have disclosed a preferred embodimentof my invention, the numeral 5 resignates a base having a threaded tap 6 adapted for attaching an air line thereto. An outer cylinder 1 rises from the base which is open at its top and in which an inner cylinder 8 or piston is arranged for working movement. The inner cylinder is open at its bottom and closed at its top as shown at 9. A felt packing ring I is positioned on the upper edge of the outer cylinder 1 and a ring II is secured to the top 9 and projects beyond the walls of the inner cylinder to strike the felt ring l0.. l

A pair of coil springs I2 connects the base with the top 9 to retract the inner cylinder.

A flexible sealing ring l3- is secured to the inner wall of the inner cylinder adjacent its lower edge by rivets l5] and projects below the lower edge of the inner cylinder. The ring [3 may be constructed of any suitable material which is impervious to moisture and oil and heat resistant. A spring steel ring I is positioned within the sealing ring and is flared at its lower edge and sealloped to produce fingers l5 adapted to expand under the influence of air pressure entering the A lower threaded tap IT. is formed in a block l8 secured to. the outer wall of the outer cylinder and which communicates with the interior thereof for attaching an exhaust pipe and a second threaded tap I9 is also formed in the block and likewise communicates with the outer cylinder above the tap l1.

A connecting rod 20 is threaded into the top 9 and extends through the top 9 into the inner cylinder with a nut 2! on its inner end adapted to engage a cross bar 22 secured on the upper ends l of studs 23 rising from the base 5 to limit outward movement of the inner cylinder. The rod 20 may be connected to a lever, valve, damper or other mechanism to be operated by the air motor.

The air outlets I! and It may be connected to auxiliary motors or valves (not shown) to utilize the exhausted air for operating the same.

The several elements forming the invention may be assembled in any practicable manner, as, for

piston may be held upwardly above the base a sufficiently distanceto permit a, person' hand to grasp the lower ends of the springs and pull the same downwardly for hooking the lower ends of the springs in the screw-eyes carried by the I base.

The cylinder l is then placed over the piston and threaded on the base, after whichthe ring I l is secured on top of the piston. i

It is believed the details of construction, operation and manner of use of the .device will be readily understood from the foregoing without further detailed explanation.

Having described the invention, what is claimed as new is:

An air motor comprising an outer cylinder having a fluid inlet at its bottom and open at its top, a hollow piston working in the cylinder and open at its bottom and closed at its top, spring means retracting the piston, said cylinder having a discharge port in its side wall, a piston rod extending into the piston and adjustably ecured therein, a stop in the cylinder, and means on the inner end of the rod engaging the stop to limit outward movement of the piston.

BEN CONES. 

